20878480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1621}}^1$

素因数の和:1664

約数の個数: 80

約数和(自身を含む): 57924864

約数和(自身を除く): 37046384

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1621, 1840, 2576, 3220, 3242, 6440, 6484, 8105, 11347, 12880, 12968, 16210, 22694, 25936, 32420, 37283, 45388, 56735, 64840, 74566, 90776, 113470, 129680, 149132, 181552, 186415, 226940, 260981, 298264, 372830, 453880, 521962, 596528, 745660, 907760, 1043924, 1304905, 1491320, 2087848, 2609810, 2982640, 4175696, 5219620, 10439240, 20878480]

約数ペア:

[(1, 20878480), (2, 10439240), (4, 5219620), (5, 4175696), (7, 2982640), (8, 2609810), (10, 2087848), (14, 1491320), (16, 1304905), (20, 1043924), (23, 907760), (28, 745660), (35, 596528), (40, 521962), (46, 453880), (56, 372830), (70, 298264), (80, 260981), (92, 226940), (112, 186415), (115, 181552), (140, 149132), (161, 129680), (184, 113470), (230, 90776), (280, 74566), (322, 64840), (368, 56735), (460, 45388), (560, 37283), (644, 32420), (805, 25936), (920, 22694), (1288, 16210), (1610, 12968), (1621, 12880), (1840, 11347), (2576, 8105), (3220, 6484), (3242, 6440)]